I already asked this question and they said that the stopover offer should be renewed for next year. However it does not seem to be 100% certain and there is no guarantee.

If it turns out that they do not have the stopover next year then I think there could definitely be a case for legal action for misleading sales. I also specifically purchased the ticket with dates to fit with a stopover, because it specifically stated that I was eligible for the stopover when in fact, the stopover program for 2024 has not even been launched yet.